Carbureting device



Ja'n. 4,1927. f 1,613,257

L. M. WQOLSON CARBURETING DEVICE iled Oct. 18, 1919 Patented Jan. 4,1927.

UNITED STATES PATENT OFFICE.

LIONEL M. WOOLSODL OE' DETROIT, MICHIGAN, ASSIGNOR TO PACKARD MOTOR CARCOMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

,oamnanr ne DEVICE.

. Application filed October 18,1919. seriaimaarsm- This inventionrelates to hydrocarbon motors and particularly to carbureting meanstherefor. 1

In hydrocarbon motors, it is desirable that heat shall be applied to theincoming mixture for the purpose of making it more easily vaporized andpreventing it from condensin on the walls of the intake conduit. One otthe methods for so heating the mixture is toconnect the motor intakepipe with a combustion chamber having an igniter and fed with acombustible mixture by an auxiliary carburetor. 1n multi-cylindermotors, particularly of the V-type, it is sometimes desirable to have aplurality of such combustion chambers,,one.for each of the separateintake conduits of the motor, and in that event two auxiliarycarburetors may be employed for supplying those combustion chambers.

One of the objects of the present invention is to provide a plurality ofauxiliary carburetors in connection with a single float chamber, for thepurpose of supplying a combustible mixture to combustion heater chambersor similar devices;

'Wlien motors' such as described above are used in airplanes, it isdesirable that fire hazards from the motor shall be eliminated orminimized as far as possible. One of the objects of the presentinvention is to provide air intake conduits for the carburetors abovereferred to so that all air for the carburetors and the float chambermay be drawn from outside of the body of the airplane or outside oftheenclosing casing of the motor, as the case may be. Other objects andadvantages of the 1nvention will appear from the following descriptiontaken in connection with the drawings which form a part of thisspecification and in which v Figure 1 is an elevation and part sectionalview of a carbureting means embodying my invention; and

Figure 2 is a plan view, partly in section, on the-line 2-2 of Figure l.

Referring to'the drawings, represents the float chamber ofth'ecarburetor 11 of a hydrocarbon motor, parts of which carburetor arebroken away in Fig. 2 as being unnecessary to the disclosure of theinvention. The float chamber is fed from any suitable source of supplyby a pipe 12, and a float 13 in the chamber operates in the usual waythrough small weighted levers 14 and a valve 15, the'upper end only ofwhich is shown in the drawings, to control the level of gasolineor'other fuel in the chamber 10. A cover 16 is removably secured overthe top of the float chamber and supports the levers 14, and a cap 17 isthreaded onto the cover to enclose the upper projecting end of the valve15. v

Lateral extensions onopposite sides of the float chamber 10 are shown at18 and on top of these extensions or parts of the float chamberarecarburetors 19. These carburetors are exactly alike and in Figure 1one of them is shown in elevation and the other in section. One onlywill be described and it will be understood that the description refersequally well to the other carburetor.

These carburetors 19 are of the compensating'type their specificconstruction forming no part of the present invention. Each of themcomprises a piece 20 which is secured to the top of the float chamberand into which a piece 21 is threaded. The piece 21 extends downwardlyinto the floatchamber and a tube 22 is telescoped over the extended endand forms a chamber 23 between these parts. This chamber has air ports24. at its upper end receiving air from the air space in the upper partofthe float chamber and a series of ports 25 are formed near the lowerend of the piece 21. This piece 21 is provided with a central conduit 26which is supplied by a restricted port 27 in the lower end of the tube22 so that gasoline from the float chamber is fed into the piece 21 andthrough the ports 25 into the lower part of the cham-- ber 23. '1 i Asleeve 28 surrounds the middle part of the piece 21 between a flange 29'thereon and the piece 20, and an air passage 30 is thus formed incommunication with a series of air passages 31 formed in the piece 21,these latter air passages communicating with an air chamber 32 and anoutlet 33 above the chamber 32. The chamber 32 and outlet 33 areformedin a piece 34 threaded onto the piece 21 and surrounding its upper end.Said upper end of the piece 21 is tapered as at 35 and lateral out-letports 36 form a communication between the upper end of the conduit 26and the outlet 33 of the car-.

buretor. V

From this description it will be observed that in the operation of themotor suction in the outlet 33 will draw air through the pas-- sages 30,31 and 32 and gasoline through the ports 27 and 25, conduit 26 and ports36. This will cause a mixture of gasoline and air in the outlet 33,which mixture will he carried to the combustion chamber of the heater inthe chamber 23 drops below the. ports-25 air will then be drawn throughthe ports 24 into the chamber 23 and through the ports 25,

to .thereb mix with the gasoline passing upwardly t irough the conduit26, This emulsion of gasoline and air will be diluted by the air fromthe chamber 32 and a less rich mixture will then pass to the outlet 33.Thus a rich mixturewill be supplied to the heater chamber for startingthe motor and a less rich mixture wil lbe supplied for steady runningconditions' For supplying air to'the carburetors '19, both at their airchambers and at their ports 24, a common air pipe 37 is provided, whichair pipe, if the motor is encased as When used in'an airplane, has itsinlet end arranged outside of, the casing or body. This air pipe, whichis common to the said carburetors, is shown as provided with threebranches38, 39 and 40, the branch 38 leading to the air' passage 30 ofthe leftrhand carburetor 19, the pipe 39 leading to the air passage 30of the right-hand carburetor 19, and the branch 40 leading to the upperpart of the float chamber 10 of the carburetor 11, said latter branchthus supplying air to the float' chamber and therefore: to the ports 24of both carburetors 19. Should there be any condensation of gasoline inany of the con nections between the carburetors 19 and their respectivecombustion chambers, as when the motor isstopped, such gasoline wouldnot leak out around the motor but would be pipes and branches, andparticularly the' branch 40; would carry such gasoline to the outside ofthe airplane body or motor casing. Other advantages and uses may befound,

and other forms may 'bemade or devised within the terms of the claims,without departing from the spirit or scope of this invention.

Having thus described my invention, what I claim and desire to secure byLetters Patcut is:

1. A carbureting device comprising a float chamber and a compensatingcarburetor extending into the float chamber and adapted to rece ve someof its air from the air coinpartment in the upper part of said floatchamber, and an air conduit connected both to said float chamber 'and tosaid carburetor. 2. In a carbureting device, the combination with afloat chamber adapted to supply liquid fuel at a predetermined level, oftWO carburetors on opposite sides of said float chamber and each havinga part extending into said chamber, and an air supply pipe havingbranches leading to said float chamher and; to said carburetors. v

3. In'a carbureting device, the combinat on with a float chamber adaptedto supply liquid fuel at apredetermined level, of a pair ofcarburetors'connected, to said float chamber and adapted to supplymixture, and an air pipe connected tosaid float chamber and saidcarburetors.

In testimony whereof I afiix my signature.

LIONEL M. 'WOOLSON.

